Question

( cot x)' |x= pi/4
solve

Answer 1

What is stopping you?

Answer 2

Where are you stuck?

Answer 3

Put yourself in my situation. If someone told you they don't know how to sit down, you'd ask them "why not", right?

Answer 4

yea

Answer 5

ok so i got the diffrnciation of cot x , its csc^2 (x) but what shoud i do with pi/4?

Answer 6

Substitute x with pi/4

Answer 7

so what will we get ? 2 ?

Answer 8

hold on let me think...

Answer 9

First of all, shouldn't it be \((\cot x) '=-\csc ^2 x\)

Answer 10

Second of all, \(\csc x=1/(\sin x)\). \(\sin(\pi/4) = \sqrt 2 / 2\)

Answer 11

wolfram alfa says 2

Answer 12

Hmmm, are you trying to irritate me?

Answer 13

no lol

Answer 14

Is the purpose of this question to look things up on wolfram alpha, or is it get the answer using math?

Answer 15

I haven't even given you an answer, only facts that would help you find an answer.

Answer 16

i know , can u give me answer

Answer 17

Well, I'd like to have some evidence that you attempted the problem first.

Answer 18

If so, I wouldn't mind giving you the answer and how to get the answer.

Answer 19

http://www.wolframalpha.com/input/?i=d%2Fdx+cot+x%2C+x+%3D+pi%2F4

Answer 20

ok let me do it

Answer 21

ok so whats next ?

Answer 22

u there ?